The JubiLee will overcome a quite a few of the problems this tool creates.
1. The External Hose: (as Mike just mentioned as I was typing this). That puts more weight on your wrist and also flops around while you work. Until we (whether you get if from Mike or me is up to you, we're a team on this) get you your JubiLee, get some velcros straps and hold that solution hose tight to the vacuum hose.
2. The Internal Jet: When this tool came out 30 some years ago, it really was a nice, inexpensive "dry tool", as the internal jetting means the vacuum "holds back" enough water that you don't wet through the fabric as much. Unfortunately, that also leads to streaking, as the nature of the spray nozzle is such that more spray is concentrated at the center. On velvets, it can create pressure streaks that are nearly impossible to groom out.
3. Trigger Reach: Due to the design of the external pressure line, you have to reach further around the tool to reach the valve, which will contribute to your hand cramping.
4. Vacuum Head Reach: The longer slope of the vacuum head seems like a nice idea for crevice work, but it too puts strain on your hand and wrist. The JubiLee allows a more natural grip to the tool, and you will find that you have less wrist, hand, and finger fatigue.
5. Side Cut: This is a term I use to describe what happens when you use an unglided, metal tool on any pile fabric, such as velvet and chenille. The hard edge of the tool, along with the way vacuum swirls in a
vortex at the edges will twist and distort the nap as you pull the tool over the fabric, especially if you are using a truck mount. With a
glide, no such "side cut" occurs.
Mike can add more things I'm sure, but these are among the reasons I'm embracing this tool as the best that's been made in ages, and in the way I train, the only extraction cleaning tool you'll need on your truck.